Twin Air Extreme/Dust/Sand Air Filter - Yamaha YZ125/250 1997/2020 WR250F 2001/2002 YZ250F 2001/2013Twin Air Extreme Dust Sand filters have 33% increased protection over standard filters. Both protective layers are 33% thicker than the original dual stage filter. Offering superior protection the foam (60 45 Pores) is bonded together to provide maximum filtration and superior airflow. FEATURES 33% Increased Protection Dual Stage Foam 20mm Thick 60 45 Pores Inch Note: Image for reference only product may vary slightly for fitment.